#include <iostream>
using namespace std;

int twoDigitAdd(int a, int b) {
    	cin>>a;
	cin>>b;
    if {a,b<=0ora,b>=100;
    cout>>"error";



 else cout<<a+b-100<<endl;
    }
   return 0;


}

int main() {
    int a = 45;
    int b = 56;
    cout << twoDigitAdd(a, b)<< endl;
	return 0;
}